menu.xml

<odoo>
    <!--Setting > Redner -->
    <menuitem id="redner_menu" name="Redner" parent="base.menu_custom" />

    <!--Setting > Redner > Templates-->
    <menuitem
        name="Templates"
        id="redner_template_menu"
        parent="redner_menu"
        action="redner_template_action"
        sequence="8"
    />

    <!-- Redner main menu item -->
    <menuitem
        id="redner_main_menu"
        name="Redner"
        parent="base.menu_management"
        sequence="15"
        groups="base.group_system,redner.group_redner_user,redner.group_redner_admin"
    />
    <!-- Templates submenu -->
    <menuitem
        id="redner_template_main_menu"
        name="Templates"
        parent="redner_main_menu"
        action="redner_template_action"
        groups="base.group_system,redner.group_redner_user"
        sequence="151"
    />

    <!-- Configuration submenu -->
    <menuitem
        id="redner_config_main_menu"
        name="Configuration"
        parent="redner_main_menu"
        action="redner_config_action"
        groups="base.group_system,redner.group_redner_admin"
        sequence="152"
    />
</odoo>